With Americans cutting the cord to their land lines, 2007 is likely to be the first calendar year in which U.S. households spend more on cell phone services, industry and government officials say.

The most recent government data show that households spent $524, on average, on cell phone bills in 2006, compared with $542 for residential and pay-phone services. By now, though, consumers almost certainly spend more on their cell phone bills, several telecom industry analysts and officials said.